It's negligence or willful rejection that yes, we are STILL monkey brain and monkey brain makes it easier to trust when everyone around you looks the same and part of the same culture (cough tribe).

The world would be more at peace if Japan was left to the Japanese (though for the love of go fuck more!), Europe to the Europeans, America to those of European ancestory ( though Koreans, Vietnamese and Cubans get a pass for being more anti commie than the natives) and the Muslims, Africans and South Americans can stay in their respective third world countries!